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NUMERICAL SIMULATION OF TOOL/ABRADABLE MATERIAL INTERACTION EXPERIMENTS

机译:刀具/可磨材料相互作用实验的数值模拟

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Applying abradable coating on the casing of turboma-chines has been widely recognized as a robust solution advantageously combining the adjustment of operating clearances with the reduction of potential non-repairable damages. Thus, the modeling of this material is a growing field of investigation. Based on the numerical strategy proposed and detailed in previous publication by the same authors, the present study aims at capturing the mechanical behavior of abradable coating in the context of high speed interaction with a rigid tool. The plastic law given is first enriched in order to take into account strain rate dependence. The sensitivity of the model regarding its main numerical parameters is assessed and highlights the role of each of these parameters. The calibration of numerical results with respect to experimental results lead to very satisfying results that confirm that the proposed strategy is well-suited for the modeling of abradable coating. Finally, the newly developped vis-coplastic law is applied to a 3D rotor/stator interaction case to determine the criticity of strain rate dependence in the case of blade/casing contact.
机译:将耐磨涂层涂覆在涡轮增压机械的壳体上已被公认为是一种可靠的解决方案,有利地将操作间隙的调整与减少潜在的不可修复的损坏相结合。因此,这种材料的建模是一个不断发展的研究领域。基于同一作者先前在出版物中提出并详述的数值策略,本研究旨在捕获在与刚性工具高速相互作用的情况下可磨耗涂层的机械性能。为了考虑应变率的依赖性,首先丰富了所给出的塑性定律。评估了模型关于其主要数值参数的敏感性,并强调了这些参数中每个参数的作用。相对于实验结果的数值结果的校准导致非常令人满意的结果,这证实了所提出的策略非常适合于耐磨涂层的建模。最后,将最新发展的粘塑性定律应用于3D转子/定子相互作用情况,以确定在叶片/机壳接触情况下对应变率依赖性的批评。

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